<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body {
            background-color: rgb(0, 0, 0, 0.8);
        }

        .map {
            position: relative;
            margin: 0 auto;
            width: 747px;
            height: 617px;
            background: url(./map.png) no-repeat;
        }

        .city {
            position: absolute;
            top: 222px;
            left: 550px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
        }

        .dotted {
            /* position: absolute;
            top: -4px;
            left: -4px; */
            width: 8px;
            height: 8px;
            background-color: blue;
            border-radius: 50%;
        }

        .pulse1,
        .pulse2,
        .pulse3 {
            position: absolute;
            left: 50%;
            top: 50%;
            width: 8px;
            height: 8px;
            box-shadow: 0 0 12px 0 blue;
            transform: translate(-50%, -50%);
            border-radius: 50%;
            animation: move 1s linear infinite;
        }

        .pulse2 {
            animation-delay: 0.5s;
        }

        .pulse3 {
            animation-delay: 1s;
        }

        @keyframes move {
            0% {}

            50% {
                width: 40px;
                height: 40px;
            }

            100% {
                width: 70px;
                height: 70px;
            }
        }
    </style>
</head>

<body>
    <div class="map">
        <div class="city">
            <div class="dotted"></div>
            <div class="pulse1"></div>
            <div class="pulse2"></div>
            <div class="pulse3"></div>
        </div>
    </div>
</body>

</html>